A data processor has no say in how and for how long is the data stored. They implement exactly hat the data controller said, not more, not less. So in this case

A data processor has no say in how and for how long is the data stored. They implement exactly hat the data controller said, not more, not less. So in this case guaranteeing 100 years is just nonsense. But... in our case it's Evernote itself who gathered all its own data from its own users according to its own rules, so I really struggle to understand why you won't see them as data controllers.